Measurement of the induced polarization of Λ (1116) in kaon electroproduction with CLAS

Marianna Gabrielyan, Brian Raue, Seema Dhamija, Daniel S. Carman

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The CLAS Collaboration is using the p(e,e′K+p)π - reaction to measure the induced polarization of the electroproduced Λ(1116). In this experiment a 5.499-GeV electron beam was incident upon an unpolarized liquidhydrogen target. The CEBAF Large Acceptance Spectrometer (CLAS) was used to detect the scattered electron, the kaon, and the decay proton from the Λ hyperon. CLAS allowed for a large kinematic acceptance in Q2 (0.75≤Q2≤3.5 GeV2) and W (1.6≤W≤3.0 GeV), as well as the kaon center-of-mass scattering angle. The goal is to map out the kinematic dependencies for the induced polarization in order to provide new constraints on models of K-hyperon production. Along with previously published photo- and electroproduction cross sections and polarization observables from CLAS, LEPS, SAPHIR, and GRAAL, these new induced polarization data are needed in coupled-channel analyses to search for previously unobserved s-channel resonances. Preliminary polarization results are presented.

Original languageEnglish (US)
Title of host publicationHadron 2009 - Proceedings of the XIII International Conference on Hadron Spectroscopy
Number of pages5
StatePublished - 2010
Externally publishedYes
Event13th International Conference on Hadron Spectroscopy, Hadron 2009 - Tallahassee, FL, United States
Duration: Nov 29 2009Dec 4 2009

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other13th International Conference on Hadron Spectroscopy, Hadron 2009
Country/TerritoryUnited States
CityTallahassee, FL


  • Electroproduction
  • Hyperon
  • Kaon
  • Polarization


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